.header{
  width: 1200px;
  overflow: hidden;
  height: 90px;
  margin-top: 90px;
  position: relative;
  z-index: 10;
  .logo{
    width: 90px;
    float: left;
    img{
      width: 90px;
    }
  }
  .menu{
    position: absolute;
    top: 0;
    right: 0;
  }
}
